Quoting moon:
There were "signs" he was doing well in '21 just like in '23. The only reason it's a big deal is that Sale finally did not get hurt, after 5 years, and somehow we should have known that was going to happen, based on how he looked for a stretch in 2023.
"Somehow we should have known" is a totally unfair way to put it. It would be ridiculous for anyone to say the Sox should have known Sale would have a season like this. I really don't think anyone has said any such thing.
The issue is with the possibility he could have a good season.